Logs... Any Linux system will generate many log files by default, containing various information about the operation of the system (normal actions, debugging information, security/authorization messages, web/email events, etc). If no rotation would occur on the various log files, then they will just grow bigger and bigger, filling up the space (on high traffic sites) but most importantly making it very difficult to find any information that we might be looking for in those log files. Fortunately this is handled in most Linux distributions by default and we don't have anything special to do to set it up... if will function out of the box, rotating the log files by default..."
